I disagree. They said everything they needed to say to one another in the scene in the burned down Luthor Mansion. They had an understanding with each one having enough leverage over the other to make everything a bit more of a fair fight, with Lex having no real reason to divulge Clark's secret to the World. This scene was perfect.

"If you look at history, the great men and women of the world have always been defined by their enemies."